Scanning
Scan each row and column to find where a number must be placed. Cross-hatching quickly eliminates possibilities.
"Every number has its place. Find it."
A classic number puzzle that tests logic and patience. Fill the 9×9 grid so every row, column, and 3×3 box contains 1–9 exactly once.
For entertainment only. This is not a clinical or diagnostic assessment.
Difficulty Levels
Easy
Each puzzle has exactly one unique solution. Use deduction, elimination, and notes to fill every cell correctly.
38–42 pre-filled cells. Perfect for beginners.
-- Completed -- Rating
Difficulty Levels
Medium
Each puzzle has exactly one unique solution. Use deduction, elimination, and notes to fill every cell correctly.
30–34 clues. Basic solving techniques required.
-- Completed -- Rating
Difficulty Levels
Hard
Each puzzle has exactly one unique solution. Use deduction, elimination, and notes to fill every cell correctly.
24–28 clues. Advanced strategies needed.
-- Completed -- Rating
Difficulty Levels
Master
Each puzzle has exactly one unique solution. Use deduction, elimination, and notes to fill every cell correctly.
17–23 clues. Expert-level challenge.
-- Completed -- Rating
Your Stats
Track your Sudoku journey.
Completion counts, best times, and ratings are saved per difficulty. Aim for that S-rank!
0 Easy 0 Medium 0 Hard 0 Master
Pro Tips
Strategies from experienced solvers.
Naked Singles
If a cell has only one possible candidate, that's the answer. Use auto-notes to spot these instantly.
Save Your Lives
Don't guess! Use notes and elimination. A wrong answer costs a life, and you only have three.
Start with Dense Areas
Focus on rows, columns, or boxes that already have many numbers filled in. They have fewer unknowns.
Clean design, smooth gameplay. The note mode is a game-changer for harder puzzles.
Finally a Sudoku that feels fair. The puzzle generation is top-notch, no repeats!
Love the share poster feature. Now I can brag about my S-rank on social media!
The hint system is perfectly balanced — helpful but doesn't spoil the puzzle.
Sudoku guide
Solve classic Sudoku with clear scoring and best records.
Fill a 9x9 grid using logic so every row, column, and 3x3 box contains each number from 1 to 9 exactly once.
Difficulty levels
Choose Easy, Medium, Hard, or Master. Each difficulty saves its own best completion record locally.
Scoring rules
The result score rewards fast solving and deducts points for mistakes, hints, and auto notes, with a minimum score of zero.
Shareable records
When you complete a puzzle, you can generate a result image that includes difficulty, time, mistakes, hints, note usage, and rating.
FAQ
Do I need to guess?
No. Generated Sudoku puzzles are intended to be solved by logic with a unique solution.
Are best records saved by difficulty?
Yes. Each difficulty keeps its own best successful completion record in local storage.
Do hints and auto notes affect the score?
Yes. Mistakes, hints, and auto notes are included in the score penalty details.
0:00 0/3